(3325) Let x1 and x2 be two real roots of x2−x−1=0. Find the value of 2x51+5x32. |
(3327) Let α and β be two real roots of x4+k=3x2 and also satisfy α+β=2. Find the value of k. |
(3320) Find one real solution (a,b,c,d) to the following system:{a+b+c+d=−2ab+ac+ad+bc+bd+cd=−3abc+abd+acd+bcd=4abcd=3 |